Method of operating gas-producers.



H. KOPPERS.

METHOD OF OPERATING GAS PRODUCERS.

APPLXCATION FILED JULY 27, 1914.

1, 146,627 Patented July 13, 1915.

' taken fr an srarns tee ere HEINRICH KOPIPERS, 01E ESSEN-ON-THE-BIUHB,GERMANY, ASSIGD TOR TO H. KOPPERS COMPANY, OF CHICAGO, ILLINOIS, ACORPORATION.

. METHOD 01E OPERATING GAS-PRODUCERS.

sage or passages for the slag, so that the solidification of the slag isprevented by direct heating thereof.

The great advantages to'be derived from withdrawal of the slag in aliquid state are frequently counterbalanced, at least in part, byobstruction of the discharge passage, or of the whole under-part-of theproducer, by solidification of the slag, and the re-liquefying of theslag which in such cases is necessary causes very serious interruptionofthe Work. For obviating this, the hearth has in some cases beenartificially heated, in order to maintain the slag in a liquid state,but the arrangements for thispurpose are inconvenient and have not.obtained complete success in practice.

According to my invention a portion of the gas generated is taken fromthe upper part of the producer and led downward over the hearth. Thisnot only obviates the necessity for artificial heating of the slag, butthe direct heating of the slag by the gas produces the desired result ina most efiicient manner. The passage of the gas through the slagdischarge orifice in itself assists in preventing obstruction of thisori- For further utilizing portion of the gas which has been used asdescribed, it is of advantage to provide the producer with a chamberinto which the discharge passage leads, similar to the outer hearth of acupola in foundry practice. The is nthis chamber for further use.

may 3 products of combust' 1. ascent la ye i For he the pro reducedmanner. tain qua Specification of Letters Patent.

through the slag discharge orifice and outer chamber, and back to theproducer, is thus obtained. The heat of gas is utilized, and the gas isrecovered or regenerated after being burnt inthe outer chamber.

Apparatus suitable for carrying the invention into efiect is shown inthe accompanying drawings, in which Figure .1 is a cross-sectionthereof; Fig. 2 is a cross section to a larger scale, showing a specialconstruction of the outer chamber. The shaft a of the producer is of theusual type, with a blast pipe 6 and twyers c. The hearth d, which mayhave a flap door and a trough for separated iron, is provided with aslag discharge passage or duct 6, leading to an outer chamber f. A pipe9, with a steam injector 7a,

the shaft on.

A portion of the very hot gases formed in front of the twyers c is takenthrough the duct 6 to the chamber 7", and these gases (or their productsof combustion, if they are burnt in the chamber 7') are forcedfrom thechamber 7' through .the pipe 5/ to the producer, by the injector h.- Theslag is thus heated and maintained in a liquidstate, and

. the passage through the duct 6 is kept clear.

Such carbon dio'xid as is presentin the gas, either due to partialcombustion in the chamber 7, is reduced to carbon monoXid upon issuingfrom the pipe 9 into the producer. The heating of the slag is thuseffected practically without loss, as the gas is restored to theproducer, together with the heat not given off by the same to the slag.

In the construction shown in Fig. 2 the outer chamber is formed by abell or dome f sealed by partial immersion in water in a tank is. Thisarrangement affords several advantages. The sealing of the chamberautomatically adjusts itself to varying prossures and the liquid slag,dropping into the water, is granulated and reduced to a state in whichit can be most conveniently re- St T 31111 water, F15.

Patented July 313, 1915. Application filed July 27, 1914.. Serial No.853,349.

lated. The gas which issues from the pas- Sage 6 remains over the Waterlevel in the bell f, and this water level adjusts itself, in

relation to the water level outside the bell,-

according to the pressure of the gas. No combustion of the gas forheating purposes takes place in the bell, and the gas can be takenthroughv a 'pipeback to the producer. As the gas pressure at the upperpart of the producer is lower than that at the bottom, owing to theintervening fuel, no artificial pressure is required order'to return theducer with discharge of the slag in a liquid state, which consists incausing a portion of the hot gas generated to passwlth the slag throughthe slag discharge passage, and in receiving said portion of the gas inan outer chamber. Y r

3. The method of operating a gas producer with discharge of the slag'ina liquid state, which consists in causing a portion of the hot gasgenerated to pass with the slag through the'slag discharge passage, inreceiving said portion of the gas in an outer chamber, and returningsame to the producer. I

4. The method of operating a gas producer with discharge of the slag ina liquid state, which consists in causing a portion of the hotgasgeneratedto pass with the slag through the slag discharge passage, inre ceiving said portlon of the gas in anouter,

chamber, and returning same to the producer bymeans'of an ih]ec tor.

5. The method of operating a "gas pro-' ducer with discharge of the slagin a liquid I state, which consists in causing a portion of the hot gasgenerated to pass with the slag through the slag discharge passage, andin" receiving said portion of the gas in an outer chamber in which theslag i simvultanepusly' quenched and granulated.

6. The .method oflperating gas pro; ducer withdischarge of the "slag ina liquid state, which consists in causing a portion of the .hot gasgenerated to pass with the slag through the slag discharge passage, andin receiving said portion of the gas in an outer rchamber in which theslag is simultaneously quenched and granulated, the quenched slag being,the quenching liquld. q

' HEINRICH KOPPERS.

Witnesses;

WOLD'EM R HA PT, HENRY HASPER.

removed through the seal formed by I

